Help with NSPointerArray and NSMapTable

I am trying to create arrays and dictionaries containing non-object  
types like NSInteger, CGFloat, and structs like NSRect. This should be  
possible using NSPointerArray/NSMapTable and appropriate pointer  
functions. But I am very much confused about which pointer function  
options to use and how to add/remove values. The documentation is very  
terse, IMHO insufficient, and I was not able to find any sample code.  
So perhaps someone here could help me and/or point me to some samples.

Her a  few more specifics.

For an array of integers, I tried an NSPointerArray with options  
(NSPointerFunctionsMallocMemory | NSPointerFunctionsCopyIn |  
NSPointerFunctionsIntegerPersonality). Would that be correct, and  
would that require more settings? Also, does  
NSPointerFunctionsIntegerPersonality refer to the pointers itself, or  
the values it points to. I.e., should I then pass pointers to the  
integers or the integers itself typed as void*? In both cases I get  
crashes, so I don't do it correct. But I can't figure out what.

Similar for structs and CGFloat. Do I need to use  
NSPointerFunctionsStructPersonality also for CGFloat (because that's  
the only one that makes sense to me)? And for both of these, would it  
suffice to use options (NSPointerFunctionsMallocMemory |  
NSPointerFunctionsCopyIn | NSPointerFunctionsStructPersonality) and  
supply a simple sizeFunction that just returns the size calculated  
using sizeof? And do I pass them by address?

Thanks,
Christiaan